SPSC LECTURER ZOOLOGY PAST PAPERS 2000 TO TILL DATE
Zoology 5 years Past Papers Click here
چار آپشن میں سے کسی ایک پر کلک کرنے سے جواب سرخ ہو جائے گا۔
سائکون میں ریڈیل نہر بنیادی طور پر ______ کے ذریعہ کھڑی ہے؟
- Porocytes
- Choanocyte
- Both A and B
- None of these
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Explanation
Choanocytes (collar cells) line the radial canals in Sycon.It help in water circulation and food capture.Porocytes are tubular cells that regulate water entry.
مچھلی پر کرسٹاسین پرجیوی کی ایک مثال _____ ہے؟
- Argulus
- Sacullins
- Both A and B
- None of these
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Explanation
Argulus (commonly called fish lice) is a crustacean parasite that attaches to the skin of fish and feeds on their blood.Sacculina is also a parasitic crustacean but primarily infects crabs, not fish.
ٹیریڈو بھی شپ کیڑا کے نام سے جانا جاتا ہے کلاس _____ سے ہے؟
- Clastropoda
- Pelecypoda
- Cyclopda
- None of these
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Explanation
Teredo, commonly known as the shipworm.It is a type of bivalve mollusk that belongs to the class Pelecypoda (Bivalvia).It is notorious for boring into and damaging wooden structures submerged in seawater, such as ships and piers.
ایتھیرین بیضوی ______ ہے؟
- Mesolecithal
- Alecithal
- Polylecithal
- None of these
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Explanation
Eutherian mammals (placental mammals) have an alecithal ovum.This meaning it contains little to no yolk because the embryo receives nutrition from the placenta.In contrast, mesolecithal and polylecithal eggs contain moderate and large amounts of yolk, respectively.
لابڈ فائن مچھلی کو معدوم سمجھا جاتا تھا جب تک کہ لاتیمیریا ______ میں پھنس گیا تھا؟
- 1967
- 1939
- 2001
- None of these
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Explanation
The Coelacanth (Latimeria), a lobe-finned fish, was believed to be extinct until its discovery in 1939 off the coast of South Africa.It is considered a "living fossil" due to its ancient lineage.
ایک مولسکس کا خول ______ کے ذریعہ چھپا ہوا ہے؟
- Visceral mass
- Radula
- Mantle
- None of these
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Explanation
The mantle is a specialized tissue in mollusks that secretes calcium carbonate to form the shell.It also plays a role in respiration and excretion.
لامارک کا ارتقائی نظریہ _____ پر مبنی تھا؟
- Survival of the fittest
- Natural selection
- Inheritance of acquired characteristics
- None of these
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Explanation
Lamarck proposed that organisms develop traits during their lifetime in response to their environment and pass them on to offspring.This theory, called Lamarckism, was later disproven by modern genetics.
اسپونگوکوئیل کے اوپری حصے میں واحد بڑی افتتاحی _____ کہلاتی ہے؟
- Osculum
- Ostium
- Mouth
- None of these
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Explanation
The osculum is the large opening at the top of the spongocoel in sponges, through which water exits.It plays a key role in the water filtration system of sponges.
ڈارون کی سب سے اہم اشاعت ______ تھی؟
- Origin of species
- Theory of uniformitarianism expedition
- Principles of geology
- None of these
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Explanation
Charles Darwin's book "On the Origin of Species" (1859) introduced the theory of natural selection.It is considered the foundation of modern evolutionary biology.
وہ ڈھانچے جو کھردری اینڈوپلاسمک ریٹیکولم کو کھردرا بناتے ہیں وہ ______ ہیں؟
- Nucleosomes
- Ribosomes
- Peroxisomes
- None of these
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Explanation
The rough endoplasmic reticulum (RER) appears rough due to the presence of ribosomes attached to its surface.These ribosomes are responsible for protein synthesis.
